Cita APA

Halcrow, H., Heady, E., & Cotner, M. (1982). Soil conservation policies, institutions and incentives. Ankeny (Iowa): Soil Conservation Society of America.

Citación estilo Chicago

Halcrow, H.G., E.O Heady, y M.L Cotner. Soil Conservation Policies, Institutions and Incentives. Ankeny (Iowa): Soil Conservation Society of America, 1982.

Cita MLA

Halcrow, H.G., E.O Heady, y M.L Cotner. Soil Conservation Policies, Institutions and Incentives. Ankeny (Iowa): Soil Conservation Society of America, 1982.